Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab980dc874284067…

MALICIOUS

PDF

72.4 KB Created: 2021-03-18 01:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5203fab4c12acdfad5b8444d8ce97c93 SHA-1: b696e7813cd42d30e566e38aea59fec5aedc246f SHA-256: ab980dc8742840676d356c27ff8a247f9adf1e1cf9d17fa1c9e94d59335070ff
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, consistent with callback phishing or tech-support scams. No scripts were extracted, but the presence of external links and the callback lure strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/strik?utm_term=how+do+i+turn+off+call+forwarding+on+my+nec+phone PDF link annotation
    • http://nizavevorupuj.mywebcommunity.org/sutemetur.pdfIn PDF document text
    • http://waystep.site/sagafetemov1lbcd.pdfIn PDF document text
    • https://cdn.sqhk.co/wetaxawirewu/gfiiJRB/osm_vnf_onboarding_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/kixepijap/eieigja/pitosuvonolaxana.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/hhHjhnA/61596957264.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/70711319067vy14w.pdfIn PDF document text
    • http://tamodemuror.getenjoyment.net/lazizejimosiraledabexim.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/how_to_set_time_on_timex_indiglo_digital_watch.pdfIn PDF document text
    • http://bellissimo.online/54755052906xxl64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/85eafe30-ed34-49c2-bef5-0fa29dbd4ba5/bariwagugipusisala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0023a4-1e32-4a33-9c58-1cb02e1e9f02/60392476083.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_1c5158a01fc64b7aa36976f8c87033b2.pdf?index=trueIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_b1dbe4c9c7e340aaa3770f7465869519.pdf?index=trueIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_50665aa4e8134c6696a04439938e8002.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_c40cc03b05c04e72b3e22bc4544f2812.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43fd7f3-ced5-4cfc-ae26-da3fbefc64fe/accu_chek_performa_fehlermeldung_e9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4404d3-c33d-4d65-b22b-ad7df119ce04/93573576040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3dc729-d6f9-4175-a316-564671896bf9/nowewirusowogeruzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e7cb119-b584-4423-b1fe-ebb5b2544bd7/what_are_the_dates_of_the_renaissance_festival.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894ab229-903b-418c-9c8c-0b93553bfc4f/organizational_culture_refers_to.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095f14eb-9678-4720-98d3-c96eaa29b79a/vuxatetami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe1b664-f389-4502-b41d-2db32846b356/what_are_the_principles_of_treatment_class_9.pdfIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_df3f910b499b4ffdb4b28ca236f037c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac39778-e570-464b-afc1-0103f814a723/is_my_sc_drivers_license_real_id.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC06 5548 bytes
SHA-256: 9e6dc6a9c0ed7d80b0b3c79fe0193f06e511a1acb5a065f3ed461d556430c802
font_01_sfnt_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 10352 bytes
SHA-256: bcfa6f165220704b9928a2ceeced08eff9ae587f382229bb1f10e6c38f53bc75